You remember the discovery from school: that in a class of 23 people the odds of finding two students who share the same birthday are better than even.
We have ten grandchildren. What is the chance that two of them share the same birthday? (There are no twins, triplets, etc.) Turns out it's not quite 12%.
Sometimes you beat the odds.
Happy birthday to two of my favorite people!
(You can play with the numbers here.)